Pressure applying means for spinning frames



G. WEST ,9

PRESSURE APPLYING MEANS FOR SPINNING FRAMES I Nov. 25, 1941.

Original Filed Oct. 21, 1958 Patented Nov, 25, 1941 PRESSURE APPLYING MEANQFORISPINNING FRAMES George West,

Whitinsville, Mass, assignor to Whitin: Machine Works, Whitinsville, Mass, a corporation. of! Massachusetts: l

Original. applicationctobe1; 21, 1938", Serial. No.

Divided and this application! October.

19, 1940; SerialNo. 361,938

(Cl. Iii-@136) 2 Claims.

This application is. a division ofmy prior ap plication Serial No, 236253; filed October 21,1938, and relates to drawing and spinning frames; such as are commonly used in the production of cotton yarn. In such fIames the rovings are passed between successive pairs of drawing and top rolls by which they are drafted to the size required to. produce the. desired weight or number of yarn.

Drafting pressure is commonly applied to the top rolls by springs or suspended weights, and the pressure is distributed in the desired ratio tothe front, middle and back top rolls through top roll sadd1es,,to which the springs or weights are connected by weight levers and stirrups or straps.

It is necessary to relieve the pressure on the top rolls from time to time to permit cleaning of the top rolls or scouring of the drawing rolls, and it is also desirable to relieve the pressure on the top rolls when the machine is to remain idle for any considerable time.

It is the general object of my present invention to provide an improved construction by which pressure can be conveniently and efiec tively applied to top rolls in a spinning or drawing frame.

Another object is to provide a pressure-applying device, the parts of which are retained in operative relation when the pressure on the top rolls is relieved. These parts may, however, be readily separated when desired.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a sectional end elevation of parts of a spinning frame embodying my improvements;

Fig. 2 is a detail elevation, partly in section, looking in the direction of the arrow 2 in Fig. 1; and

Figs. 3 and 4 are sectional elevations showing certain parts appearing in Fig. 1 but in different operative positions.

Referring to Fig. l I have shown parts of a spinning frame including a roller beam ||l supporting a plurality of roll stands II which provide bearings for a front drawing roll l2, a middle drawing roll l4 and a back drawing roll l5. Top rolls :0, 2| and 22 rest on the rolls 2, l4 and 5 respectively, and are held for rotation in the positions shown by any usual guide means, not shown.

' Top: rollsaddle are provided for each, seti oi top. roll'sand comprise front saddles. 25 and rear saddles. 26".. The front end of'each front saddle 25 rests on a front top roll 2|] and appliesipressure thereto, while the back saddle 26 rests on a middle roll 21 and back roll 22and applies pressure to said rolls in a predetermined ratio.

The parts thus far described are of the usualconstruction and in themselves form no part of my present invention, which relates particularly to improved means for applying pressure to thetop rollsaddles and for. retaining the parts'in operative relation when the pressure is relieved.

For-the purpose ofapplying pressure to a set of toprolls, I prefer touse-a weight W, positioned below the usualcreel-board 4'0 and connected to a stirrup 4|- by a link 42 and lever 43. The upper end of the stirrup 4| is pivoted on a crosspin 45 fixed in a cam member 46, which is mounted between the spaced sides of a slotted block 41.

When the cam member 46 is in the full line position shown in Fig. 1, pressure will be applied to the top rolls 20, 2| and 22, but when the member 46 is moved to the dotted line position in Fig. 1, the pressure will be relieved.

The lever 43 is provided with a slot or opening 59 at one end for pivotal connection with a looped element 5| at the upper end of the usual adjustable lever screw or eyebolt 52. The slot.

5|) is preferably slightly closed after the parts are assembled, to prevent separation of the lever and eye-bolt. The lever 43 is provided with a second hook 55 normally extending through a slot 56 at the lower end of the stirrup 4| and thus providing a pressure-applying connection to the stirrup.

The lever 43 is also provided with a lug 10 projecting upward from its upper edge and. positioned adjacent the hook 55 but spaced laterally therefrom.

The link 42 is pivoted at 60 to the free or swinging end of the lever 43. The link 42 is preferably provided with a loop 6| (Fig. 2) at its upper end and with a washer 62 which rests on the upper surface of the creel board 40 and overlies a slot 63 through which the link 42 extends. The washer 62 limits downward movement of the link 42 and weight W when the loop 6| has moved downward to the dotted line position shown in Fig. 2. At its lower end, the link 42 is provided with a hook 64 to support the weight W.

When the weight is relieved on the top rolls 20, 2| and 22 by swinging the cam member 46 to the dotted line position, the lever 43, link 42 and weight W will move downward until the loop 6| reaches the dotted line position shown in Fig. 2, in which position the lever 43 assumes the position shown in Figs. 3 and 4.

With the parts in the position shown in Fig. 3, it will be clear that the tension on the top rolls is entirely released, but at the same time the hook 55 and lug 10 cooperate to prevent separation of the stirrup 4| and lever 43. The end of the hook 55 still extends partially through the slot 56, and the lug I prevents further separation of the parts. I

If the stirrup 4| and the top roll saddles 25 and 25 are to be removed from the spinning frame, the stirrup 4| and lever 43 may be easily separated by swinging the stirrup outward as it is raised, so that the parts will separate as indicated in Fig. 4.

The retention of the stirrups 4| and levers 43 in operative relation when the top roll pressure is relieved is a matter of considerable importance, as the pressure is relieved on all of the top rolls whenever the frame is to stand idle for any extendedtime, and a considerable amount of time and labor would be expended if it was necessary to reassemble each stirrup and lever before pres sure could be applied to a set of top rolls.

' It will be noted that this feature of my invention may be utilized with many diiferent devices for relieving pressure and is not necessarily limited to usewith the particular pressure-relieving construction shown in Fig. 1.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a drawing mechanism having upper and lower drafting rolls, in combination, a frame, means to apply pressure to said upper rolls comprising a saddle, an eye-bolt fixed in said frame, a stirrup connected to said saddle, and a pressure lever pivoted to said eye-bolt by an inverted hook on said lever at One end thereof, said lever having a weight suspended from the other end thereof and having a second and upright hook on its top edge adjacent and rearward of said inverted hook, said second hook detachably connecting the lower end of said stirrup to said lever, and said lever having 2. lug adjacent said second hook which prevents accidental disengagement of said stirrup from said second hook when tension on said stirrup is released.

2. In a drawing mechanism having upper and lower drafting rolls, in combination, a frame, means to apply pressure to said upper rolls including a stirrup, an eye-bolt fixed in said frame, and a pressure lever pivotally connected at one end to said eye-bolt, said lever having a weight suspended from the other end thereof and having an upright hook on its top edge and having means adjacent said upright hook which prevents accidental disengagement of said stirrup from said hook when tension on said stirrup is released but which permits convenient manual disengagement of said stirrup and lever, said hook detachably connecting said stirrup to said lever and being positioned between said eye-bolt connection and the point of suspension of said weight.

GEORGE WEST. 

